Tool for matching an object

ABSTRACT

The invention relates to a tool for machining an object, which tool has a multiplicity of fingers arranged in layers, wherein the fingers are spaced apart from one another within the layers.

The invention relates to a tool for machining an object, which tool hasa multiplicity of fingers arranged in layers, wherein the fingers arespaced apart from one another within the layers.

During the machining of workpieces, burrs may arise. Said generallysharp edges may lead to injuries during the handling of a componentand/or to an impairment of subsequent process steps (e.g. edge thinningduring powder coating, inaccuracies of fit, etc.).

Within the scope of the deburring, the burrs on the component areremoved. The removal of burrs frequently requires a two-stage approach.In the first step, the primary burr is removed, followed by thesecondary burr. The second step is frequently required since the primaryburr is not completely abraded, but rather is reshaped. In addition tothe deburring, frequently what is referred to as edge rounding isadditionally required in order to meet further quality requirements.

Deburring and rounding machines have caught on in the sphere ofdeburring and edge rounding 2D and sometimes also 3D workpieces. Inmachines of this type, use is generally made of a grinding belt unit orplate unit having grinding belts or grinding disks for removing theprimary burr, and subsequently the secondary burr or the edge roundingis removed or produced by means of deburring and rounding tools. Theedge rounding should be considered critical as the radius increases. Thequadratic relationship between radius and chip volume imposesconsiderable demands on the tools which are used. A doubling of the edgeradius leads to a quadrupling of the chip volume.

In order to achieve relatively large edge roundings with a given tooland workpiece, the machine has to be operated in such a manner that therounding tools have as long an action duration as possible (low feedspeed) and are advanced in an appropriately deep manner with respect tothe workpiece edges. The long action duration and the deep advance leadin consequence to extended process times, increased tool wear and to anundesirable introduction of heat into the workpiece.

In addition, the low feed speed for the edge rounding is not inproportion to the removal of the primary burr. The removal of theprimary burr can be carried out at feed speeds of between 1 to 10 m/min,for pronounced edge rounding feed speeds of between 0.2 to 0.5 m/min arecarried out.

For the deburring and edge rounding of 2D and sometimes also 3Dworkpieces of metallic materials with varying workpiece contours, toolshaving abrasive materials consisting of a combination with a grindingcloth and grinding fleece are primarily used in the prior art. In mostapplications, the abrasive materials involve grinding means on a base asthe main element. In order to be able to adapt the abrasive materials tothe workpiece contours, said abrasive materials are partially used in aweb-slotted design and are provided with soft intermediate layers orsupport layers (for example grinding fleeces, tampico fiber). The toolscan be designed in the form of rolls, plates or blocks in accordancewith the respective machining principle or machining unit.

Despite the various possibilities of configuring the tools (for examplegrinding fabric graining, grinding fleece density, etc.), the abrasionrates to date have not been satisfactory, and therefore the operationhas to be carried out with low feed speeds and deep infeed. Theseprocess parameters are at the expense of the economic efficiency ofdeburring and rounding processes.

It is the object of the present invention to specify a tool formachining, preferably for deburring and/or edge rounding, an object,which tool permits higher feed speeds with the same edge rounding or amore pronounced edge rounding at the same feed speed. In addition, it isthe object to specify a method for deburring and rounding edges of aworkpiece within a process step.

The object is achieved by the tool for machining an object as claimed inclaim 1, the method for removing secondary burrs as claimed in claim 31and the method for deburring and rounding as claimed in claim 32. Thedependent claims specify advantageous developments of the invention.

According to the invention, a tool for machining an object is specified.The tool has a multiplicity of finger layers which each extend in alayer area. Each of the finger layers has a plurality of fingers.Advantageously, each layer area has at least three, particularlypreferably at least five fingers. A layer area can be considered to bethat area which is spanned by the fingers of the finger layer,advantageously in an undeflected state of the fingers. The convexcovering of the fingers in the layer area can advantageously beconsidered to be the spanned surface here. According to the invention,the finger layers are arranged one behind another in such a manner thatthe layer areas of adjacent finger layers overlap at least in regions.This can, but does not have to, mean that the fingers also overlap. Thismeans that a projection of a finger layer in a direction perpendicularto the finger layer onto the adjacent finger layer overlaps with theadjacent finger layer. There is therefore a region here of the adjacentfinger layer that is covered by the projection. The overlapping of theadjacent layers can be, but does not have to be, complete. For example,in the case of the tool block form also described below, there can becomplete overlapping, whereas in the case of the plate-like andcylindrical tool geometries also described below, there is normally onlya partial overlap. The layer areas are preferably plane. Advantageously,in the undeflected state of the fingers, the finger layers themselves donot mutually overlap.

According to the invention, each of the finger layers has a plurality offingers. The latter are configured in such a manner that they arebendable from an undeflected state in a direction which stands on thelayer area of the corresponding finger layer, i.e. which does not standparallel to the layer area or in the layer area. For example, thedirection in which the fingers are bendable can stand perpendicularly tothe layer area of the corresponding finger layer. Preferably, thedirection in which a finger is in each case bendable can standperpendicularly on a longitudinal direction of the finger and/orperpendicularly on a surface of the finger in each position of thefinger. The surface of the finger here is preferably its largestsurface, i.e. the surface in which said finger extends flat. Theundeflected state of a finger is that state in which the fingercompletely lies in the layer area of that finger layer which said fingeris a finger of. The finger can be considered, for example, to be abendable tongue.

According to the invention, the fingers are each of planar design and,in the undeflected state, extend in the layer area of that finger layerto which they belong. The fact that the fingers are of planar designmeans here that they are flat, i.e. that they have a greater extent,normally a very much greater extent, in the direction of the layer areaof that finger layer to which they belong, than in a directionperpendicular to the layer area.

In the undeflected state, the fingers of the same finger layerpreferably each extend parallel to one another. The fingers areadvantageously of elongate design, which means that they have asignificantly greater extent in a direction in their layer area than inthe direction perpendicular thereto in the layer area and advantageouslyalso than in the direction perpendicular thereto perpendicularly to thelayer area. That direction in which the fingers have the greater extentin the layer area is referred to below as the longitudinal direction ofthe corresponding finger. In such a configuration, the longitudinaldirections of the fingers of the same finger layer each lie parallel toone another in the undeflected state. Advantageously, the edges of thefingers of the same finger layer also run parallel to one another in theundeflected state. If, however, the fingers have edges which are notstraight in the undeflected state, it also suffices if the longitudinaldirections run parallel.

The extent of the fingers in the layer area perpendicular to thelongitudinal direction will be referred to as the width of the fingers.The extent of the fingers in a direction perpendicular to the layer areawill be referred to as the thickness. The length is preferably greaterthan the width and the width greater than the thickness of the fingers.

According to the invention, in the undeflected state, directly adjacentfingers of the same finger layer are at a distance greater than zerofrom one another. Said distance is preferably constant, i.e. in eachcase has the same value over the entire length of the fingers. Thedistance can be measured here, for example, from one edge of the onefinger to the closest edge of the adjacent finger. The arrangement ofthe fingers within a finger layer can therefore be considered to becomb-shaped. The fingers are therefore preferably not produced from thefinger layer by just a rectilinear section, but rather by the fact thata partial surface of that layer from which the finger layer is producedis removed between adjacent fingers.

A working direction can advantageously be defined in the tool. This isthen that direction in which the tool is moved during use as intended. Amovement as intended can be, for example, a movement over a rectilinearedge, said movement taking place in such a manner that the fingers brushover the rectilinear edge with their largest surface, wherein therectilinear edge preferably lies parallel to said largest surface of thefingers as they brush thereover. The fingers are then preferably movablein a direction out of the layer area, with respect to which the workingdirection lies parallel or tangentially. The layer planes thenadvantageously extend in a non-disappearing angle or perpendicularly tothe working direction.

By means of the spacing of adjacent fingers of the same layer, a highdegree of flexibility of the fingers is brought about. By this means, itis possible to arrange the finger layers one behind another directly orat small distances without support material, such as, for example, afleece having to be provided between the finger layers. A high densityof fingers is thereby obtained, from which a high grinding powerfollows. By this means, higher feed speeds for the same edge rounding ora pronounced edge rounding at the same feed speed can be achieved.

The fingers of the same finger layer are advantageously elasticallybendable independently from one another from the undeflected state. Thefact that the fingers are bendable independently from one another fromthe deflected state means that the exerting of a force on precisely oneof the fingers, said force bending said finger, does not lead to otherfingers of the same layer being bent. The fact that the finger isbendable elastically from the undeflected state means that, when theforce ceases, the finger substantially returns into the undeflectedstate. This results in a high capability of adaptation to any desiredworkpiece contours in the event of a high density of fingers.

It should be pointed out that the geometries described here of the tool,the fingers and the finger layers can mean an idealization in the sensethat many of the materials used for the finger layers are plasticallydeformable to a certain extent in practice. As a result, the tool or thefingers can have or take on shapes differing to a certain extent fromthe geometries described here because of the production or because ofthe use of the tool. However, a person skilled in the art willundoubtedly be able to assign such differing shapes to the geometriesdescribed here, and therefore said differing shapes should be regardedas covered by the scope of protection.

The arrangement according to the invention makes it possible to realizethe tool without support material between the finger layers. There istherefore preferably no material between the fingers of adjacent fingerlayers. In that region in which the fingers are bendable, there ispreferably no material between fingers of adjacent finger layers.

The finger layers can advantageously be held by a carrying structurewhich is arranged at one end of the fingers. The finger layers can be,for example, adhesively bonded into said carrying structure.

In an advantageous configuration of the invention, the fingers of atleast some of the finger layers can be arranged in such a manner thattheir projection onto a finger layer in each case adjacent to the fingerlayers falls into the distances between the fingers of the adjacentfinger layer and/or next to the fingers of the adjacent finger layer.The projection can advantageously take place here in a directionstanding at a non-disappearing angle or perpendicularly to the layerarea of one of the corresponding finger layers, or can take place inthat direction in which the fingers are bendable from their undeflectedstate. A projection in the working direction can also be possible. Theprojection and the finger layer onto which the projection is madeadvantageously do not overlap, i.e. the projection advantageously fallscompletely between the fingers of the respective adjacent layer. Such anarrangement can be used in order to increase the flexibility of the toolsince the bending of the fingers is not obstructed by the adjacentfinger layer. In an advantageous configuration of the invention, thefingers of all of the respectively adjacent finger layers can thereby bearranged offset with respect to one another.

It can be advantageous if the distance between adjacent fingers of thesame layer is greater than a width of said fingers, i.e. the extent ofthe fingers in that direction in which said fingers are adjacent. Ifsuch finger layers are arranged as described above such that the fingersof adjacent finger layers are in each case offset in relation to oneanother, the effect is thereby achieved that, during the bending, thefingers engage at a distance from the fingers of the adjacent fingerlayer between said fingers without rubbing thereagainst.

In an advantageous configuration of the invention, the fingers of atleast some of the finger layers can overlap with the fingers of therespectively adjacent finger layers. Said overlap can therefore exist inparticular in the projection of the fingers of the respective fingerlayer in a direction perpendicular to the finger layer onto the adjacentfinger layer. The overlap can be complete or partial for one or bothfingers. The strength of the tool can thereby be increased. By means ofa combination of this configuration with the above-describedconfiguration of fingers arranged in an offset manner, the strength ofthe tool can be flexibly adjusted.

In the event that fingers of adjacent layers are arranged in anoverlapping manner as described, it can be advantageous if a distance isprovided between the adjacent layers, the fingers of which are arrangedin an overlapping manner with respect to one another. For example, aspacer layer can in each case be arranged between the adjacent layers,the dimensions of which spacer layer advantageously coincide with thedimensions of the adjacent finger layers.

In the event of overlapping fingers as described above, the fingers oftwo, three, four or more directly adjacent finger layers in a projectionin a direction perpendicular to one of said finger layers on a commonplane can overlap. This means that the fingers of said two, three, fouror more finger layers can lie one behind another in a directionperpendicular to the layer area of one of said layers.

The strength of the tool can also be adjusted via the distance ofadjacent finger layers from one another. Advantageously, adjacent fingerlayers can directly border one another or can be spaced apart at adistance of one thickness or two, three or more thicknesses of fingerlayers from one another. The distance of two finger layers here is thedistance of the layer areas of said finger layers from one another, asmeasured perpendicularly to the layer area. The distance here ispreferably measured at that point of the finger layer to which thefingers are fastened. This is relevant in particular in the case of thecylindrical arrangement of the layers, which arrangement has yet to bedescribed below, where the adjacent finger layers can enclose anon-disappearing angle with respect to one another. In the case of aplate-like arrangement, the described distance is preferably measured atthe inner edge of the layers, i.e. at the center point of the edgefacing the plate.

In the undeflected state, the finger layers are preferably plane, andtherefore the layer areas of the finger layers are thus plane.

In an advantageous configuration of the invention, the finger layers canbe positioned obliquely in relation to a direction in which the tool ismoved passed the object to be machined. This means that the fingerlayers can preferably enclose an angle of greater than 0° and smallerthan 180 with a line along which the finger layers are arranged onebehind another. The layers here can preferably enclose an angle ofgreater than −45° and smaller than +45° with said line.

The fingers preferably each have at least one grinding and/or abrasivesurface. Said grinding and/or abrasive surface is preferably a surfaceof the corresponding finger that is parallel to that surface in whichthe corresponding finger extends in a planar manner.

The fingers can preferably be designed as grinding means on a base. Thegrinding means here can be applied to a carrier and can form thegrinding and/or abrasive surface therewith.

If the fingers are configured as grinding means on a base, the base canadvantageously have cotton, polyester or polycotton or can be composedthereof. However, the finger layers can also themselves have a grindingand/or abrasive material or can be composed thereof. In this case, agrinding or abrasive material does not have to be applied to thefingers.

The grinding and/or abrasive material of the fingers can advantageouslyhave grain sizes of greater than or equal to grain size 12, preferablygreater than or equal to grain size 50, preferably greater than or equalto grain size 100, and/or smaller than or equal to grain size 320,preferably smaller than or equal to grain size 240, preferably smallerthan or equal to grain size 150.

In an advantageous configuration of the invention, adjacent fingerlayers of the finger layers can be configured in such a manner that saidfinger layers placed one above another completely fill a rectangularsurface. This configuration can be produced particularly efficiently bythe two adjacent finger layers being cut out of a rectangular layer bymeans of an intersecting line.

Advantageously, a length of the fingers can be greater than or equal to20 mm, preferably greater than or equal to 30 mm, particularlypreferably greater than or equal to 40 mm, and/or smaller than or equalto 150 mm, preferably smaller than or equal to 120 mm, preferablysmaller than or equal to 90 mm, preferably smaller than or equal to 70mm, preferably smaller than or equal to 60 mm, particularly preferablysmaller than or equal to 50 mm. All of the fingers of the tooladvantageously have the same length.

In an advantageous configuration of the invention, the individualfingers for their part can be slotted. Slots can be introduced here intothe fingers, the slots passing through the fingers and extendingparallel to the longitudinal direction of the fingers. A plurality ofslots can also advantageously be arranged one behind another along astraight line, wherein the straight line can run parallel to thelongitudinal axes of the fingers. Advantageously, in each case aplurality of parallel slots or a plurality of parallel rows of slots canbe provided in the fingers.

The width of the fingers, i.e. an extent of the fingers in thatdirection in which the fingers of the same layer are arranged next toone another, can preferably be greater than or equal to 2 mm, preferablygreater than or equal to 5 mm, particularly preferably greater than orequal to 7 mm, and/or less than or equal to 20 mm, preferably less thanor equal to 15 mm, particularly preferably less than or equal to 10 mm.

A thickness of the finger layers or of the fingers without optionallyapplied grinding means can preferably be greater than or equal to 0.5mm, preferably greater than or equal to 1 mm, and/or smaller than orequal to 2 mm, preferably smaller than or equal to 1 mm.

In an advantageous configuration of the invention, all of the fingerlayers can be arranged one behind another parallel to one another, andtherefore a surface spanned by the finger layers perpendicular to thelongitudinal directions of the fingers is rectangular. The entire toolpreferably has a block shape here.

In said block-shaped configuration, the tool in that direction in whichthe fingers of the same layers are arranged next to one another canadvantageously have an extent of greater than or equal to 50 mm,preferably greater than or equal to 70 mm and/or smaller than or equalto 100 mm, preferably smaller than or equal to 80 mm. This extent willbe referred to here as the width of the tool.

A depth or length of the tool, i.e. an extent of the tool in thatdirection in which the finger layers are arranged one behind another canpreferably be greater than or equal to 50 mm, preferably greater than orequal to 60 mm, and/or smaller than or equal to 80 mm, preferablysmaller than or equal to 70 mm.

In a further advantageous configuration of the invention which will bereferred to here as the plate-like configuration, the finger layers canbe arranged one behind another along a closed circular line, wherein thelayer areas stand perpendicularly on the circular line, and wherein thefingers stand perpendicularly on the area of a circle described by thecircular line, i.e. of that plane in which the circle runs. In thisconfiguration, the finger layers can be arranged on a carrier in theshape of a circular ring, wherein the individual fingers standperpendicularly on a circular ring surface of the carrier.

In the case of a plate-like configuration of the tool, it can beadvantageous if, in addition to said finger layers, a multiplicity offurther finger layers are provided which are arranged along the furtherclosed circular line. The further closed circular line can runconcentrically here with respect to the circular line of theaforementioned first finger arrangement and can have a greater orsmaller radius than said first circular line. The further finger layerscan therefore run within or outside the finger layers described first.The fingers of the further finger layers preferably have the same lengthas the fingers of the first finger layers and are arranged in such amanner that the ends of the further fingers run in the same planes asthe ends of the fingers of the first finger layers. This configurationof the invention permits more uniform machining since the density of thefingers in the case of a plate-like arrangement decreases outward in theradial direction. If an inner radius of the arrangement of the firstfinger layers is selected to be larger, the further finger layers can bearranged in the interior of the arrangement of the first finger layers,with it being possible for the number of the further finger layers to beselected to be smaller than the number of the first finger layers. Anexcessive increase in the density of fingers inward in the radialdirection can thereby be avoided. In a corresponding manner, the furtherfinger layers could also be arranged with a greater number around thefirst finger layers, and therefore a decrease in the density of fingersoutward can be avoided.

In the case of a plate-like arrangement, the tool can advantageouslyhave a diameter in the plane of the circular line of greater than orequal to 50 mm, preferably greater than or equal to 80 mm, preferablygreater than or equal to 100 mm, preferably greater than or equal to 115mm, preferably greater than or equal to 125 mm, preferably greater thanor equal to 150 mm, and/or smaller than or equal to 1500 mm, preferablysmaller than or equal to 1000 mm, preferably smaller than or equal to400 mm, preferably smaller than or equal to 250 mm, preferably smallerthan or equal to 200 mm.

In the case of a plate-like arrangement, the finger layers in adirection in which the fingers of the same layers are arranged next toone another can have a width of greater than or equal to 15 mm,preferably greater than or equal to 20 mm, preferably greater than orequal to 30 mm, and/or smaller than or equal to 100 mm, preferablysmaller than or equal to 65 mm, preferably smaller than or equal to 60mm, preferably smaller than or equal to 50 mm, preferably smaller thanor equal to 40 mm.

In an advantageous configuration, a multiplicity of the finger layerscan be combined into in each case one block. Each block in thatdirection in which the finger layers are arranged one behind another canadvantageously have a depth of greater than or equal to 20 mm,preferably greater than or equal to 35 mm, preferably greater than orequal to 45 mm, and/or smaller than or equal to 70 mm, preferablysmaller than or equal to 55 mm.

In a further advantageous configuration of the invention, the fingerlayers can be arranged one behind another along a closed circular line,wherein, in turn, the layer areas stand perpendicularly on the circularline, and wherein the fingers in their longitudinal direction extendradially with respect to an axis which runs through the center point ofthe circular line and stands perpendicularly on the circular surfaceenclosed by the circular line. This configuration of the tool will bereferred to below as a cylindrical configuration. The tips of thefingers can lie here on a common cylinder surface. Similarly, the pointsof the fingers at which said fingers are fastened ca lie on a commoncylinder surface. The finger layers normally stand here at an angleabout said axis with respect to one another. The fingers can preferablybe arranged here on a cylindrical carrier structure.

A diameter of the tool in the cylindrical configuration, as measuredbetween tips of the fingers lying opposite the axis in a directionradially with respect to the circular line or axis can advantageously begreater than or equal to 50 mm, preferably greater than equal to 100 mm,particularly preferably greater than or equal to 200 mm, and/or smallerthan or equal to 400 mm, preferably smaller than or equal to 300 mm.

A width of the tool, i.e. its extent in a direction perpendicular to thecircular surface enclosed by the closed circular line or in thedirection of the axis can preferably be greater than or equal to 20 mm,preferably greater than or equal to 100 mm, preferably greater than orequal to 500 mm, preferably greater than or equal to 1500 mm, and/orsmaller than or equal to 2500 mm, preferably smaller than or equal to2000 mm, particularly preferably smaller than or equal to 1700 mm.

A flexibility of the tool can be set or varied in different ways.Firstly, the flexibility can be influenced by the choice of theprofiling of the finger layers or of the fingers. Furthermore, it isoptionally possible to influence the capability of adaptation of thetool by the arrangement of the fingers as described. It is furthermoreoptionally possible, at a given rigidity of the fingers, to introducedistances, for example by spacer pieces, in the root region of thefingers, i.e. in the region neighboring the fastening of the fingers. Bythis means, the bendable length of the fingers can be changed and, as aresult, so too can the rigidity of the fingers.

Furthermore, optionally laminated main finger layers can be used inorder to influence the rigidity of the element.

In an advantageous configuration of the invention, the outermost fingersof each finger layer can be beveled in a manner dropping toward the edgeof the finger layer. Advantageously, the fingers can become shortertoward the edge. The fingers can advantageously also become narrowertoward the edge. A softer engagement is obtained by means of saidconfiguration.

The tool according to the invention is advantageously a tool fordeburring edges of a metallic workpiece and/or a tool for rounding edgesof a metallic workpiece, i.e. a deburring or rounding tool.

According to the invention, in addition, a method for removing secondaryburrs on one or more edges of a metallic workpiece and/or for roundingone or more edges of a metallic workpiece is indicated. A tool asdescribed above is moved here over the edge to be machined such that thefinger layers brush the edge. By means of the brushing of the edge bythe finger layers, a secondary burr on the edge is removed and/or theedge is rounded.

The tool is preferably moved in a direction which stands perpendicularlyto the edge to be machined. In addition, the tool is preferably moved ina direction which does not stand parallel to the finger layers in theundeflected state. The direction can preferably stand perpendicularly tothe finger layers in the undeflected state.

According to the invention, in addition, a method for deburring androunding one or more edges of a metallic workpiece is specified, whereina tool, as has been described above, is moved over the edge in such amanner that the finger layers brush the edge, and therefore, by thebrushing of the edge by means of the finger layers, a primary burr onthe edge is removed and the edge is rounded. Here too, the tool isadvantageously moved in a direction perpendicular to the direction ofthe edge to be machined. Advantageously, the tool is also moved here ina direction perpendicular to the layer areas in the undeflected state.The configuration of the tool according to the invention makes itpossible both to remove a primary burr and to round off the edge. Theremoval of the primary burr and the rounding off can be brought abouthere in a common step.

By means of the invention, the abrasion power of the tool issubstantially increased over tools of the same size according to theprior art. As a result, more pronounced edge roundings can be obtainedwithin a shorter time and the economic efficiency of the manufacturingcan be improved. Furthermore, the higher power capability leads to thepossibility of integrating process steps which are carried outindependently of one another in the prior art. For example, the processsteps of removing the primary burr, of removing the secondary burr andof edge rounding can be combined by the high abrasion power of theinvention into one process. Completely new machine configurations arethereby conceivable.

The invention will be explained below by way of example with referenceto a number of figures. The same reference signs identify identical orcorresponding features. The features shown in the examples can also berealized independently of the specific example and combined betweendifferent examples.

In the figures:

FIG. 1 shows a cylindrical configuration of a tool according to theinvention,

FIG. 2 shows a plate-like configuration of a tool according to theinvention,

FIG. 3 shows a block-shaped configuration of a tool according to theinvention,

FIG. 4 shows a plate-like configuration of a tool according to theinvention in a top view,

FIG. 5 shows a plate-like configuration of a tool according to theinvention with two rows in a top view,

FIG. 6 shows a schematic illustration of an arrangement of fingers in atool according to the invention,

FIG. 7 shows a schematic illustration of an arrangement of fingers in atool according to the invention,

FIG. 8 shows a schematic illustration of an arrangement of fingers in atool according to the invention,

FIG. 9 shows a process sequence of deburring and edge rounding accordingto the prior art,

FIG. 10 shows an optional oblique position of the layers in relation tothe direction of movement,

FIG. 11 shows an optional configuration of the invention with fingerswhich are beveled at the edge,

FIG. 12 shows an optional configuration of two layers of the inventionwith fingers which have serrated edges, and

FIG. 13 shows an optional configuration of a finger layer with slottedfingers.

FIG. 1 shows a cylindrical configuration of a tool according to theinvention in a complete view and an enlarged detail. The tool has amultiplicity of finger layers 1 a, 1 b, 1 c which each extend in a layerarea. For the sake of clarity, only three of the finger layers 1 a, 1 band 1 c will be expressly named below while the figure itself shows amultiplicity of further finger layers for which what is stated withregard to finger layers 1 a, 1 b and 1 c correspondingly applies.

The finger layers 1 a, 1 b and 1 c are arranged one behind another insuch a manner that they overlap with the layer areas of adjacent fingerlayers 1 a, 1 b, 1 c. In the cylindrical shape shown in FIG. 1, adjacentfinger layers 1 a, 1 b, 1 c are at a non-disappearing angle with respectto one another, as a result of which the overlapping is not a completeoverlapping.

Each of the finger layers 1 a, 1 b, 1 c has a plurality of fingers 2 a,2 b and 2 c. For the sake of clarity, only the fingers 2 a, 2 b and 2 cwill be expressly mentioned while the tool has a multiplicity of furtherfingers for which what is stated with regard to fingers 2 a, 2 b and 2 ccorrespondingly applies. In FIG. 1, the fingers 2 aq, 2 b, 2 c all havethe same length.

The fingers 2 a, 2 b and 2 c are bendable from an undeflected state in adirection perpendicular to the layer area of the corresponding fingerlayer 1 a, 1 b, 1 c. In FIG. 1, the fingers 2 a, 2 b, 2 c are in theundeflected state.

The fingers 2 a, 2 b, 2 c are each of planar design and, in theundeflected state shown, extend in the layer area of the correspondingfinger layer 1 a, 1 b, 1 c. In the undeflected state, fingers 2 a, 2 b,2 c of the same finger layer 1 a, 1 b, 1 c each extend parallel to oneanother. The longitudinal directions of the fingers 2 a, 2 b, 2 c of thesame finger layer 1 a, 1 b, 1 c therefore lie parallel to one another.In the undeflected state, respectively adjacent fingers 2 a, 2 b, 2 c ofthe same finger layer 1 a, 1 b, 1 c are spaced apart from one another bya distance greater than zero.

In the cylindrical configuration of the tool according to the inventionthat is shown in FIG. 1, the finger layers 1 a, 1 b, 1 c are arrangedone behind another along a closed circular line. The layer areas of thefinger layers 1 a, 1 b, 1 c each stand perpendicularly on the circularline. The fingers 2 a, 2 b, 2 c extend with their longitudinal directionradially with respect to an axis which runs through a center point ofthe circular line and which stands perpendicularly on the circledescribed by the circular line.

All of the finger layers 1 a, 1 b, 1 c are arranged on a common carrierstructure 3. The fingers 2 a, 2 b, 2 c of all of the finger layers 1 a,1 b, 1 c are fastened at one end to the carrier structure 3. In thecylindrical configuration of the tool according to the inventionaccording to FIG. 1, the carrier structure 3 has a cylinder shape aboutthat axis as cylinder axis with respect to which the fingers having 2 a,2 b, 2 c extend radially with their longitudinal direction.

FIG. 2 shows a plate-like configuration of a tool according to theinvention. In the plate-like configuration of FIG. 2, a multiplicity offinger layers 1 a, 1 b, 1 c, which each extend in a layer area, arearranged one behind another along a circular line in such a manner thatthe layer areas of adjacent finger layers of the finger layers 1 a, 1 b,1 c overlap. On account of the plate-like arrangement, the overlappingis incomplete. For the sake of clarity, reference is also made here onlyto three of the finger layers 1 a, 1 b, 1 c, wherein what is statedapplies correspondingly for the other finger layers.

Each of the finger layers 1 a, 1 b, 1 c has a plurality of fingers 2 a,2 b, 2 c. For the sake of clarity, only three of the fingers 2 a, 2 b, 2c are discussed while what is stated applies correspondingly for theother fingers which are shown.

The fingers 2 a, 2 b, 2 c are bendable from an undeflected state in adirection perpendicular to the layer area of the corresponding fingerlayers 1 a, 1 b, 1 c. The fingers are shown in the undeflected state inFIG. 2. The fingers 2 a, 2 b, 2 c are in each case of planar design and,in the undeflected state, extend in the layer area of the correspondingfinger layer 1 a, 1 b, 1 c. In the undeflected state, the fingers 2 a, 2b, 2 c of the same finger layer 1 a, 1 b, 1 c also in each case extendparallel to one another here and all have the same length. Also in theexample shown in FIG. 2, adjacent fingers 2 a, 2 b, 2 c of the samefinger layer 1 a, 1 b, 1 c have a distance of greater than zero from oneanother in the undeflected state.

In the plate-like configuration shown in FIG. 2, the finger layers 1 a,1 b, 1 c are arranged one behind another along a closed circular line,wherein the layer areas of the finger layers 1 a, 1 b, 1 c standperpendicularly on the circular line, and wherein the fingers 2 a, 2 b,2 c stand perpendicularly on the area of a circle described by thecircular line. The finger layers 1 a, 1 b, 1 c are arranged on a carrierstructure 3 which, in the plate-like configuration of FIG. 2, can have aplanar shape in the form of a circular ring. The area of the shape ofthe circular ring lies in the plane described by the closed circularline. The fingers 2 a, 2 b, 2 c are arranged with one end on the carrierstructure 3 and stand with their longitudinal directions perpendicularlyon the surface of the carrier structure 3. During use, the plate-likeconfiguration can be moved over an edge of a workpiece by the fact thatthe tool is rotated about an axis which passes through the center pointof the closed circular line and stands parallel to the longitudinaldirections of the fingers 2 a, 2 b, 2 c.

FIG. 3 shows a block-shaped configuration of a tool according to theinvention. The tool in turn has a multiplicity of finger layers 1 a, 1b, 1 c, of which, for the sake of clarity, only three layers 1 a, 1 b, 1c will be mentioned while the same correspondingly applies to the otherlayers which are shown. The finger layers 1 a, 1 b, 1 c are arranged onebehind another in such a manner that the layer areas of adjacent fingerlayers of the finger layers 1 a, 1 b, 1 c overlap. In the block-shapedconfiguration, said overlapping can be complete. Furthermore, in theblock-shaped configuration, the layer areas of all of the finger layers1 a, 1 b, 1 c can completely overlap.

In turn, each of the finger layers 1 a, 1 b, 1 c has a plurality offingers 2 a, 2 b, 2 c, of which likewise only three fingers 2 a, 2 b, 2c will be discussed while what is stated applies correspondingly for theother fingers which are shown. Since all of the fingers 2 a, 2 b, 2 c ofall of the finger layers 1 a, 1 b, 1 c in the example shown have thesame length, the entire tool has a substantially cubic shape.

Also in the case of the block-shaped configuration of the invention, thefingers 2 a, 2 b, 2 c of the finger layers 1 a, 1 b, 1 c are in eachcase of planar design and, in the undeflected state, extend in thecorresponding layer area which here is plane. In turn, the fingers 2 a,2 b, 2 c are bendable from an undeflected state. The figure also showsthe fingers 2 a, 2 b, 2 c here in the undeflected state.

In the undeflected state, the fingers 2 a, 2 b, 2 c of the same fingerlayer 1 a, 1 b, 1 c each extend parallel to one another. In theundeflected state, adjacent fingers 2 a, 2 b, 2 c of the same fingerlayer 1 a, 1 b, 1 c have a distance of greater than zero from oneanother.

In the configuration shown in FIG. 3, the finger layers 1 a, 1 b, 1 care arranged on a common carrier structure 3 which can have arectangular shape in the case of the block-shaped configuration of FIG.3. In the example shown, the fingers 2 a, 2 b, 2 c of all of the fingerlayers 1 a, 1 b, 1 c stand perpendicularly on the plane defined by therectangle of the carrier structure 3.

FIG. 4 shows a further example of a plate-like configuration of the toolaccording to the invention according to FIG. 2. In FIG. 4, the tool isshown in a top view in a direction perpendicular to that plane in whichthe circular line runs. The finger layers 1 a, 1 b, 1 c extend radiallywith respect to the center point of the circular line. The finger layers1 a, 1 b, 1 c are illustrated here as continuous lines, but they havethe fingers 2 a, 2 b, 2 c which are described in FIG. 2 and are notbroken up here. It can be seen that a density of the finger layers 1 a,1 b, 1 c and therefore a density of the fingers 2 a, 2 b, 2 c decreasesfrom the inside to the outside. In order to counteract the resultinginhomogeneity of the finger density, a plate-like workpiece, as shown inFIG. 5, can be configured. In this example, in addition to the fingerlayers 1 a, 1 b, 1 c, a multiplicity of further finger layers 1 b, 1 e,1 f are provided which are arranged along a further closed circular linewith a smaller radius. Only three of the further finger layers 1 d, 1 e,1 f are also discussed again here while a multiplicity of further fingerlayers are arranged along the inner circular line for which that statedwith regard to the finger layers 1 d, 1 e, 1 f correspondingly applies.

The further closed circular line along which the finger layers 1 d, 1 e,1 f are arranged is arranged concentrically with respect to said firstcircular line and has a smaller radius than the latter. The two circularlines run in the same plane. The inner arrangement of finger layers 1 d,1 e, 1 f has a smaller number of finger layers 1 d, 1 e, 1 f, as aresult of which the finger density in the region of the inner fingerlayers 1 d, 1 e, 1 f is reduced in relation to a configuration in whichthe outer finger layers 1 a, 1 b, 1 c would be continued into the regionin which the inner finger layers 1 d, 1 e, 1 f are arranged in FIG. 5.The tool shown in FIG. 5 thereby permits more homogeneous machining overa larger surface than the tool which is shown in FIG. 4 and has the sameouter dimensions.

FIGS. 6, 7 and 8 show by way of example various possible arrangements offingers and finger layers in the tool according to the invention. Thefingers are illustrated schematically here as straight lines. Thestraight lines here can be regarded as a root or fastening line of thecorresponding finger on a carrying structure 3 or as upper sides of thefingers at that end of the fingers lying opposite the carrying structure3. The finger layers are illustrated parallel to one another in FIGS. 6,7 and 8, which is relevant in the block-shaped and the cylindricalconfiguration. In a plate-like configuration of the tool, the fingerlayers would be at an angle with respect to one another in theillustration of FIGS. 6, 7 and 8. Since, however, said angle is verysmall, it would scarcely be seen in the figures, and therefore FIGS. 6,7 and 8 can also be considered to be relevant for the plate-likeconfiguration.

FIG. 6 shows an arrangement of fingers. Only the fingers 2 a to 2 f areexpressly mentioned here. What is stated applies correspondingly for theother fingers which are shown.

In FIG. 6, the fingers of adjacent finger layers 1 a to 1 e are arrangedoffset with respect to one another. This means that the fingers 2 a, 2b, 2 c of the finger layer 1 a in a projection onto the adjacent fingerlayer 1 b are arranged at the distances between the fingers 2 d, 2 e, 2f of said adjacent finger layer. The projection here is in a directionperpendicular to the layer area of the finger layer 1 a or 1 b. In acorresponding manner, in FIG. 6, the fingers of all of the adjacentfinger layers of the finger layers 1 a to 1 e in said projection arearranged in the distances between the fingers or next to the fingers ofthe adjacent finger layer 1 a to 1 e.

FIG. 7 shows a possible arrangement of fingers 2 a to 2 l in fingerlayers 1 a to 1 i. The fingers 2 a, 2 b, 2 c of the finger layer 1 aoverlap in a projection onto the adjacent finger layer 1 b in adirection perpendicular to the surface thereof with the fingers 2 g, 2 hand 2 i of said finger layer 1 b. Accordingly, the fingers of the fingerlayer 1 c also overlap with the fingers of the finger layer 1 a and 1 b.The fingers 2 a to 2 i of the finger layers 1 a to 1 c are thereforearranged one behind another in a direction perpendicular to the layerarea of said finger layers.

The fingers 2 j to 2 l of the finger layers 1 d to 1 f which adjoin thelayers 1 a to 1 c in a projection in the direction perpendicular to thelayer area of the finger layers 1 a to 1 c or 1 d to 1 f are arranged inthe distances between the adjacent layer 1 c. On the other hand, thefingers 2 j to 2 l of the layers 1 d to 1 f are arranged one behindanother or in an overlapping manner, as described above the layers 1 ato 1 c. The fingers of the layers 1 g to 1 i are in turn arranged behindthe fingers 2 a to 2 i of the layers 1 a to 1 c, i.e. in an overlappingmanner therewith, as described above. They are therefore arranged in thedistances between the fingers of the layers 1 d to 1 f or next to thefingers of said layers in the projection.

FIG. 8 shows an arrangement of fingers 2 a to 2 f in finger layers 1 ato 1 d. The fingers 2 a to 2 f of adjacent finger layers 1 a to 1 d fallin turn here, as shown in FIG. 6, in the projection into the distancesbetween the respectively adjacent finger layers 1 a to 1 d.

In all of the figures, all of the fingers each have the same width andthe same distances from one another. This is optional but advantageous.While, in FIGS. 6 and 7, the width of the fingers is equal to thedistance between adjacent fingers of the same layer, in the exampleshown in FIG. 8 the fingers 2 a to 2 f have a smaller width than thedistance between adjacent fingers of the fingers 2 a to 2 f of the samelayer 1 a to 1 d. Fingers 2 d to 2 f of a finger layer 1 b thereby fallat a distance 4 between the fingers 2 a to 2 c of the adjacent fingerlayer 1 a or 1 c. The fingers 2 d to 2 f can therefore be bent withoutrubbing or butting against the fingers 2 a to 2 c of adjacent fingerlayers 1 a to 1 d.

FIG. 9 shows by way of example a progression of a method for deburringand edge rounding a workpiece. In a state Z1, a workpiece with a primaryburr is present. A primary burr can be produced, for example, by theworkpiece having been punched out of a metal sheet or by parts havingbeen punched out of the workpiece. The prior art now provides a step S1in which the primary burr is removed. The removal of the primary burrcan take place, for example, by means of an encircling belt with anabrasive surface. In many cases, the primary burr is thereby notcompletely removed but rather at least partially reshaped into what isreferred to as a secondary burr. The step S1 can therefore lead to astate Z2 in which a workpiece with a secondary burr is present. A stepS2 of removing the secondary burr then has to follow, which leads to adeburred workpiece in a state Z3. It is necessary for many applicationsfor the edges of the deburred workpiece to be rounded off to a certainsize, for example in order to prevent flaking of paint to besubsequently applied. The rounding off of the edges is achieved by anedge rounding step S3 which is applied to the deburred workpiece. Theresult of said step S3 is a state Z4 in which an edge-rounded workpieceis present.

FIG. 10 shows an optional oblique position of the layers in relation tothat direction in which the tool is moved during use. The upper partialimage shows a top view corresponding to FIG. 6. The left, lower partialimage shows a sectional view along the intersecting line A-A shown inthe upper partial image, and the right, lower partial image shows asectional view along the line B-B shown in the upper partial image.

The direction of movement of the tool during use stands perpendicularlyto that direction along which the fingers of the same layer are arrangednext to one another, i.e. to the right or left in the upper partialimage. It can be seen in the sectional views that the layers 1 a to 1 eare inclined here in relation to the direction of movement by an anglenot equal to 90°. Adjacent layers of the layers 1 a to 1 d are inclinedhere in opposite directions. In the example shown, the layers 1 a, 1 band 1 c are inclined to the right and the layers 1 d and 1 e to theleft.

FIG. 11 shows a configuration of the invention corresponding to theembodiment shown in FIG. 6. The uppermost partial image here shows theposition of the fingers 1 a to 1 h from above, the middle partial imagea side view of the surface of the fingers and the lower partial image aposition of the fingers 1 a to 1 h from above. The embodiment shown inFIG. 11 differs from the embodiment shown in FIG. 6 in that, in FIG. 11,the outermost fingers 2 a, 2 d, 2 g, 2 h of each finger layer areinclined dropping toward the edge of the finger layer. The fingers aretherefore becoming shorter toward the edge. The fingers can also becomenarrower toward the edge. By means of this configuration, a softerengagement is obtained.

FIG. 12 shows by way of example an embodiment of the finger layers 1 ato 1 d in which the finger layers have serrated edges. The basic shapeof the finger layer corresponds to that shown in FIG. 3, with thedifference that the edges of the fingers 2 a, 2 b, 2 c are serrated.Partial image A shows one of the finger layers 1A.

Partial FIG. 12B shows a starting layer from which the finger layers 1 aand 1 b can be produced by being cut out. An intersecting line(optionally serrated here) is introduced here into the layer and runs inan alternating manner in serrated long sections and rectilinear shortsections. Two finger layers 1 a and 1 b which each have elongate fingers2 a, 2 b and 2 c are thereby separated from the starting layer.

Partial FIG. 12C shows a top view of the two finger layers 1 a and 1 bwhich are produced in accordance with partial FIG. 12B and are arrangedone behind another here corresponding to FIG. 3. It is seen that thelayers overlap here in the region of their serrations in the projection.The fingers of the same finger layer 1 a or 1 b are each arranged withtheir longitudinal directions parallel to one another.

FIG. 13 shows an example of an optional configuration of a finger layer1 a in which the fingers are in each case slotted. For this purpose,three rows of slots 5 arranged one behind another in the direction ofthe longitudinal direction of the fingers are in each case introducedinto the fingers 2 a, 2 b, 2 c. The slots run here with theirlongitudinal direction parallel to the longitudinal direction of thefingers 2 a, 2 b, 2 c. In the example shown, the finger layer 1 a hasfive fingers which each have three rows of slots, wherein each row ofslots has four slots 5 arranged one behind another.

The tool according to the invention can now be used in a method forremoving secondary burrs on an edge of a metallic workpiece, i.e. instep S2.

It can alternatively or additionally also be used in step S3 forrounding an edge of a metallic workpiece. The tool is moved here overthe edge of the workpiece in such a manner that the finger layers brushthe edge to be machined and thereby remove the secondary burr and/orround off the edge.

The tool according to the invention can be used particularlyadvantageously in a method in which, in a common step, primary burrs areremoved at edges of the tool and the edges are rounded. The workpiececan therefore be machined by means of the tool according to theinvention from state Z1 into state Z4 in just one step. For thispurpose, in turn, the tool is moved over the edge in such a manner thatthe finger layers brush the edge and thereby remove the primary burrsand round off the edge.

1. A tool for machining an object, having a multiplicity of fingerlayers which each extend in a layer area, wherein the finger layers arearranged one behind another in such a manner that the layer areas ofadjacent finger layers of the finger layers overlap at least in regions,wherein each finger layer has a plurality of fingers, wherein thefingers of the finger layers are bendable from an undeflected state in adirection standing on the layer area of the corresponding finger layer,wherein the fingers of the finger layers are each of planar arrangement,and, in the undeflected state, extend in the corresponding layer area,wherein, in the undeflected state, adjacent fingers of the same fingerlayer are spaced apart from one another by a distance greater than zero.2. The tool as claimed in claim 1, wherein the fingers of the samefinger layer are elastically bendable independently of one another fromthe undeflected state.
 3. The tool as claimed in claim 1, wherein thereis no material between the fingers of adjacent finger layers of thefinger layers.
 4. The tool as claimed in claim 1, wherein, in theundeflected state, the fingers of the same finger layer each extendparallel to one another.
 5. The tool as claimed in claim 1, wherein thefingers of at least some of the finger layers are arranged in aprojection onto a finger layer adjacent to the finger layers in thedistances between the fingers or next to the fingers of said adjacentfinger layer.
 6. The tool as claimed in claim 1, wherein the distancebetween adjacent fingers of the same layer is greater than a width ofsaid fingers in a direction in which said fingers are adjacent.
 7. Thetool as claimed in claim 1, wherein the fingers of at least some of thefinger layers in a projection onto a finger layer adjacent to thisfinger layer in a direction perpendicular to the surface thereof arearranged in a manner overlapping with the fingers of said adjacentfinger layer.
 8. The tool as claimed in claim 7, wherein the fingers oftwo, three, four or more of the finger layers overlap in a projection ina direction perpendicular to one of said finger layers onto a commonplane.
 9. The tool as claimed in claim 1, wherein adjacent finger layersof the finger layers directly border one another or are spaced apartfrom one another at a distance of one thickness or two, three or morethicknesses of the finger layers.
 10. The tool as claimed in claim 1,wherein, in the undeflected state, the layer areas are planar.
 11. Thetool as claimed in claim 1, wherein the finger layers enclose an angleof greater than zero degrees and smaller than 180 degrees with a linealong which the finger layers are arranged one behind another.
 12. Thetool as claimed in claim 11, wherein the fingers each have at least onegrinding and/or abrasive surface which lies parallel to that area inwhich the corresponding finger extends flat.
 13. The tool as claimed inclaim 12, wherein the fingers are configured as grinding means on abase, wherein the grinding means is applied to the grinding and/orabrasive surface.
 14. The tool as claimed in claim 1, wherein thefingers have cotton, polyester or polycotton as the base.
 15. The toolas claimed in claim 1, wherein adjacent finger layers of the fingerlayers are configured in such a manner that said finger layers placedone above another completely fill a rectangular area.
 16. The tool asclaimed in claim 1, wherein a length of the fingers in a directionperpendicular to that direction in which the fingers of the same fingerlayer are arranged next to one another and perpendicularly to thatdirection in which the finger layers are arranged one behind another isgreater than or equal to 20 mm, and/or is smaller than or equal to 150mm.
 17. The tool as claimed in claim 1, wherein a width of the fingersin that direction in which the fingers of the same layer are arrangednext to one another is greater than or equal to 1 mm, and/or smallerthan or equal to 20 mm.
 18. The tool as claimed in claim 1, wherein allof the finger layers are arranged one behind another parallel to oneanother and an area, which is spanned by the finger layers,perpendicular to the layer areas is rectangular.
 19. The tool as claimedin claim 18, wherein the tool in that direction in which the fingers ofthe same layers are arranged next to one another has a width of greaterthan or equal to 20 mm, and/or smaller than or equal to 100 mm.
 20. Thetool as claimed in claim 18, wherein the tool in that direction in whichthe finger layers are arranged one behind another has a depth of greaterthan or equal to 30 mm, and/or smaller than or equal to 70 mm.
 21. Thetool as claimed in claim 1, wherein the finger layers are arranged onebehind another along a closed circular line or a segment of a circularline, wherein the layer areas stand on the circular line, and whereinthe fingers stand perpendicularly on the area of a circle described bythe circular line.
 22. The tool as claimed in claim 21, wherein, inaddition, a multiplicity of further finger layers are arranged along afurther closed circular line or a segment of a further circular line,wherein the further circular line is arranged concentrically withrespect to said circular line and has a greater or smaller radius thansaid circular line.
 23. The tool as claimed in claim 21, wherein thetool has a diameter of greater than or equal to 50 mm, and/or smallerthan or equal to 1500 mm.
 24. The tool as claimed in claim 21, whereinthe finger layers in that direction in which the fingers of the samelayers are arranged next to one another has a width of greater than orequal to 15 mm, and/or smaller than or equal to 100 mm.
 25. The tool asclaimed in claim 21, wherein a multiplicity of the finger layers arecombined into in each case one block which preferably in that directionin which the finger layers are arranged one behind another has a depthof greater than or equal to 20 mm, and/or smaller than or equal to 70mm.
 26. The tool as claimed in claim 1, wherein the finger layers arearranged one behind another along a closed circular line, wherein thelayer areas stand perpendicularly on the circular line, and wherein thefingers extend with their longitudinal direction radially with respectto an axis which runs through a center point of the circular line andstands perpendicularly on the circular line.
 27. The tool as claimed inclaim 26, wherein a diameter of the tool in a direction radially withrespect to the circular line is greater than or equal to 50 mm, and/orsmaller than or equal to 400 mm.
 28. The tool as claimed in claim 26,wherein a width of the tool in a direction perpendicular to the closedcircular line is greater than or equal to 20 mm, and/or smaller than orequal to 2500 mm.
 29. The tool as claimed in claim 1, wherein at leastsome or all of the fingers have at least one slot.
 30. The tool asclaimed in claim 1, wherein the tool is a tool for deburring and/orrounding edges of a workpiece, and/or is a deburring and/or roundingtool.
 31. A method for removing secondary burs on an edge of a workpieceand/or for rounding an edge of a workpiece, using a tool for machiningan object, having a multiplicity of finger layers which each extend in alayer area, wherein the finger layers are arranged one behind another insuch a manner that the layer areas of adjacent finger layers of thefinger layers overlap at least in regions, wherein each finger layer hasa plurality of fingers, wherein the fingers of the finger layers arebendable from an undeflected state in a direction standing on the layerarea of the corresponding finger layer, wherein the fingers of thefinger layers are each of planar arrangement, and, in the undeflectedstate, extend in the corresponding layer area, wherein, in theundeflected state, adjacent fingers of the same finger layer are spacedapart from one another by a distance greater than zero, the methodcomprising: moving the tool relative to the workpiece over the edge suchthat the finger layers brush the edge, and therefore, by means of thebrushing of the edge by the finger layers, a secondary bur on the edgeis removed and/or the edge is rounded.
 32. A method for deburring androunding an edge of a workpiece, using a tool for machining an object,having a multiplicity of finger layers which each extend in a layerarea, wherein the finger layers are arranged one behind another in sucha manner that the layer areas of adjacent finger layers of the fingerlayers overlap at least in regions, wherein each finger layer has aplurality of fingers, wherein the fingers of the finger layers arebendable from an undeflected state in a direction standing on the layerarea of the corresponding finger layer, wherein the fingers of thefinger layers are each of planar arrangement, and, in the undeflectedstate, extend in the corresponding layer area, wherein, in theundeflected state, adjacent fingers of the same finger layer are spacedapart from one another by a distance greater than zero, the methodcomprising: moving the tool relative to the workpiece over the edge suchthat the finger layers brush the edge, and therefore, by means of thebrushing of the edge by the finger layers, a primary bur on the edge isremoved and the edge is rounded.
 33. The method as claimed in claim 31,wherein the workpiece is a metallic workpiece.